hostid.c 1.1 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * Mini hostid implementation for busybox
  4. *
  5. * Copyright (C) 2000 Edward Betts <edward@debian.org>.
  6. *
  7. * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  8. */
  9. /* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
  10. //config:config HOSTID
  11. //config: bool "hostid"
  12. //config: default y
  13. //config: help
  14. //config: hostid prints the numeric identifier (in hexadecimal) for
  15. //config: the current host.
  16. //applet:IF_HOSTID(APPLET_NOFORK(hostid, hostid, BB_DIR_USR_BIN, BB_SUID_DROP, hostid))
  17. //kbuild:lib-$(CONFIG_HOSTID) += hostid.o
  18. //usage:#define hostid_trivial_usage
  19. //usage: ""
  20. //usage:#define hostid_full_usage "\n\n"
  21. //usage: "Print out a unique 32-bit identifier for the machine"
  22. #include "libbb.h"
  23. /* This is a NOFORK applet. Be very careful! */
  24. int hostid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  25. int hostid_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  26. {
  27. if (argv[1]) {
  28. bb_show_usage();
  29. }
  30. /* POSIX says gethostid returns a "32-bit identifier" */
  31. printf("%08x\n", (unsigned)(uint32_t)gethostid());
  32. return fflush_all();
  33. }